What is the primary advantage of using Smart Objects in Photoshop?

The primary advantage of using Smart Objects in Photoshop is their capability for non-destructive editing of layers. When you convert a layer to a Smart Object, you can apply various transformations, filters, and adjustments without permanently altering the original layer's content. This means that you can resize, rotate, or apply filters to the Smart Object and later edit or revert these changes at any time, preserving the original quality and enabling flexibility in the editing process.

This non-destructive approach allows for greater experimentation since you can try different effects and adjustments without the fear of losing the original image data. For example, if you apply a Gaussian Blur filter to a Smart Object, you can reopen the filter settings at any time to adjust the blur amount or even remove the effect altogether without affecting the original image.

While the other choices mention potentially relevant aspects, they either do not accurately reflect the most significant advantage of Smart Objects or pertain to features that are secondary in comparison to non-destructive editing. For example, while Smart Objects can maintain quality when scaled (which might seem like increasing resolution), they do not actually increase the image resolution itself but rather preserve details during transformations.